https://doi.org/10.1051/epjconf/201819304004
Direct observation of slow fission from the width of K x-ray line
1
Variable Energy Cyclotron Center, Kolkata 700064, India
2
Raniganj Girls' College, Raniganj, West Bengal 713358, India
3
Inter-University Accelerator Center, New Delhi 110067, India
* Corresponding author: ray@vecc.gov.in
Published online: 14 November 2018
An atomic clock based on the measurement of the intrinsic width of K x-ray lines has been used to obtain evidence of long-lived fission of the highly excited plutonium nuclei produced in the fusion of 4He+238U at E(4He)Lab=60 MeV. The mean fission time of the long-lived fission could be obtained from the increase of the intrinsic width of plutonium K x-ray line using quantum energy-time uncertainty principle. The presence of long-lived fission (mean fission time >1×10-18 s) has been found and the fluorescence yield per fission event shows that most of the fission events are slow (~10-18 s).
© The Authors, published by EDP Sciences, 2018
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